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AACC International Approved Methods - AACC Method 39-20.01. Near-Infrared Reflectance Method for Protein and Oil Determination in Soybeans

AACC International Approved Methods

Infrared Analysis

AACCI Method 39-20.01/b>
Near-Infrared Reflectance Method for Protein and Oil Determination in Soybeans

VIEW METHOD

Objective
Protein or oil content determination in soybeans may be ascertained by near-infrared reflectance readings of the ground meal either at discrete nonadjoining wavelengths or in a continuous wavelength region. Measurement is based upon a calibration to a suitable standard method (protein from Method 46-11.02, oil from Method 30-25.01, and moisture from Method 44-15.02). Near-infrared absorptions, attributable to combination or overtone vibrational frequencies of NH, CH, OH, and CO, are the primary bases of protein and oil content models.